You must show this card when you re-enter Canada on a commercial vehicle, such as an airplane, boat, train or bus. If you return to Canada in a private vehicle, such as your car, there are other documents you can use.
If you plan to leave Canada, check your card’s expiry date to make sure that it will still be valid when you return. Most cards are valid for five years.
If you do not plan to leave Canada, you do not need the card.